Can we take a moment to appreciate how the one thing Bellamy has structured his entire life around, “My sister, my responsibility.”, is crashing down around him and he doesn’t know what to do. He just poisoned his very own sister. Sure, they have had their differences in the past, but nothing like this. Bellamy spent the last six years of his life waiting to finally return to his sister. He came to the ground, fully anticipating Octavia to welcome him home with open arms after they had made peace with one another over the radio in Praimfaya.
After hearing the transmission through the prisoner ship, he went into full protective brother mode, under the impression he would be saving Octavia from terrorists. He comes to the ground, Clarke still alive after having believed her to be dead for two thousand days, and in reality, having to save his sister from herself rather than a new vengeful enemy. His world is quite literally crumbling at his feet, and has now put every basic instinct he has had since a child of being his sister’s keeper to the side in order to save Clarke. The. Woman. Who. He. Loves.
Realization of the extremes he will go to, to not lose Clarke again are dawning on him as he watches his sister lying motionless in bed. You can see the panic begin to settle in as he is left alone with Clarke, the reason he put his sister in a coma. He is frantic, fearing that Octavia won’t wake from this, that it won’t bring them to peace, that it was all for nothing, and at what cost?
As he quickly begins to lose all sense of stability, and the tide doused in pain and doubt threatens to consume him, Clarke is right there, giving him reassurance and her immediate support, even after six years of being apart.
Clarke can see she’s starting to lose him, so she offers a shaky, “Hey”, reeling him back in before the horizon engulfs him. Just that one, simple word, and his eyes are drawn back down to hers. No barrier of time, love, or war can tear these two apart. Regardless of how many days, months, years they went unaware that the other was very much alive and real, they still can bring each other home with a single breath. One word, and he’s ready to face whatever obstacles lie ahead. Together.
It is only when Bellamy’s eyes meet hers once again, that he is able to stifle the weightlessness he feels. Six years, and she is still his constant. Six years, and she is the one who knows how to keep him grounded. Six years, and she is still entirely and magnificently, his center of gravity.